PHARMACOPEIA INC
10-Q, 1997-08-13
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                   FORM 10-Q

(Mark One)
     [X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
          EXCHANGE ACT OF 1934

     For the quarterly period ended June 30, 1997

                                      or

     [_]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
          EXCHANGE ACT OF 1934

                        Commission File Number: 0-27118
                                                -------

                              PHARMACOPEIA, INC.

- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter

Delaware                                                 33-0557266
- --------------------------------------------------------------------------------
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization

101 College Road East, Princeton, New Jersey                        08540
- --------------------------------------------------------------------------------
(Address of principal executive offices)                         (Zip code)

                                 (609) 452-3600
- --------------------------------------------------------------------------------
             (Registrant's telephone number, including area code)

                                Not Applicable
- --------------------------------------------------------------------------------
(Former name, former address and former fiscal year, if changed since last 
                                    report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or such shorter period that the registrant was required
to file such reports) and (2) has been subject to such filing requirements for 
the past 90 days-- Yes  X    No___
                       ---

Indicate the number of shares outstanding of each of the issuer's classes of 
common stock, as of the latest practicable date:


               CLASS                         OUTSTANDING AT JULY 31, 1997
   ------------------------------       -------------------------------------
   Common Stock, $.0001 par value                   11,561,098
<PAGE>
 
                              PHARMACOPEIA, INC.

                                   FORM 10-Q

                               TABLE OF CONTENTS

<TABLE> 
<CAPTION> 
ITEM                                                                     PAGE
- ----                                                                     ----
<S>                                                                      <C> 
PART 1. FINANCIAL INFORMATION

Item 1.        Financial Statements:
          
               Balance Sheets-June 30, 1997 and December 31, 1996          3

               Statements of Operations-Three and Six Months Ended         4
               June 30, 1997 and 1996             

               Statements of Cash Flows-Six Months Ended                   5
               June 30, 1997 and 1996

               Notes to Financial Statements                               6

Item 2.        Management's Discussion and Analysis of Financial          7-9
               Condition and Results of Operations
          
PART II. OTHER INFORMATION               

Item 2.        Changes in Securities                                      10 

Item 4.        Submission of Matters to a Vote of Security Holders       10-11

Item 6.        Exhibits and Reports on Form 8-K                          12-13

SIGNATURE                                                                 14

INDEX TO EXHIBITS                                                         15
</TABLE> 

                                      -2-
<PAGE>
 
                                    PART 1
                             FINANCIAL INFORMATION


ITEM 1. FINANCIAL STATEMENTS

                              PHARMACOPEIA, INC.
                                BALANCE SHEETS
                   (DOLLARS IN THOUSANDS, EXCEPT SHARE DATA)

<TABLE> 
<CAPTION> 
                                                                        JUNE 30,      DECEMBER 31,                
                                                                          1997           1996
                                                                        ---------------------------                
                                                                        (UNAUDITED)
<S>                                                                     <C>            <C> 
ASSETS
 Current assets:
  Cash and cash equivalents                                             $    5,803     $    17,059   
  Marketable securities                                                     53,056          64,423                 
  Prepaid expenses and other current assets                                  2,072           1,525                 
                                                                        ---------------------------                
Total current assets                                                        60,931          83,007                 
                                                                        ---------------------------                
                                                                                                                   
Non-current investments in marketable securities                            19,088                                 
Property and equipment, net                                                 10,013           8,295                 
Other assets                                                                   342             677                 
                                                                        ---------------------------                
                                                                        $   90,374     $    91,979                 
                                                                        ===========================                 
                                                                                                                   
LIABILITIES AND STOCKHOLDERS' EQUITY                                                                              
 Current liabilities:                                                                                              
  Accounts payable                                                      $      830     $       742                 
  Accrued liabilities                                                        2,132           2,240                 
  Notes payable, current portion                                               678             710                 
  Deferred revenue                                                          13,060          15,088                 
                                                                        ---------------------------                
Total current liabilities                                                   16,700          18,780                 
                                                                                                                   
Notes payable, long-term portion                                             1,078           1,405                 
Deferred revenue, long-term                                                  1,614           2,046                 
                                                                                                                   
Commitments                                                                                                       
                                                                                                                   
Stockholders' equity:                                                                                             
  Preferred stock, $.0001 par value; 2,000,000 shares authorized;                                                  
   none issued and outstanding                                                                                      
  Common stock, $.0001 par value; 40,000,000 shares authorized;                                                    
   11,557,004 and 11,267,499 shares issued and outstanding at                                                      
   June 30, 1997 and December 31, 1996, respectively                             1               1                 
  Additional paid-in capital                                               101,883          97,542                 
  Accumulated deficit                                                      (30,902)        (27,795)                
                                                                        ---------------------------                
Total stockholders' equity                                                  70,982          69,748                 
                                                                        ---------------------------                
                                                                        $   90,374     $    91,979                 
                                                                        ===========================                 
</TABLE> 

        See accompanying notes to these unaudited financial statements.

                                      -3-
<PAGE>
 
                              PHARMACOPEIA, INC.

                           STATEMENTS OF OPERATIONS
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)


<TABLE> 
<CAPTION> 
                                        THREE MONTHS ENDED JUNE 30,    SIX MONTHS ENDED JUNE 30,
                                            1997          1996            1997          1996
                                        ---------------------------    -------------------------
                                                (UNAUDITED)                   (UNAUDITED)

<S>                                     <C>           <C>              <C>          <C> 
Contract revenue                            $5,586        $2,847          $11,518       $4,854

Operating expenses:
 Research and development:
  Collaborative                              4,178         2,680            8,329        4,887
  Proprietary                                2,821         1,890            5,550        3,740
 General and administrative                  1,319         1,163            2,777        2,570
                                        ---------------------------    -------------------------
Operating loss                              (2,732)       (2,886)          (5,138)      (6,343)

Interest income                              1,096         1,004            2,160        1,883
Interest expense                               (61)          (63)            (128)        (114)
                                        ---------------------------    -------------------------
Net loss                                   $(1,697)      $(1,945)         $(3,106)     $(4,574)
                                        ---------------------------    -------------------------

Net loss per share                           $(.15)        $(.18)           $(.27)       $(.43)
                                        ===========================    =========================

Weighted-average number of
common shares outstanding
during the period                       11,371,134    10,852,144       11,320,723   10,671,341
                                        ===========================    =========================
</TABLE> 

        See accompanying notes to these unaudited financial statements.

                                      -4-
<PAGE>
 
                              PHARMACOPEIA, INC.

                           STATEMENTS OF CASH FLOWS
                            (DOLLARS IN THOUSANDS)

<TABLE> 
<CAPTION> 
                                                                               SIX MONTHS ENDED JUNE 30,
                                                                                  1997          1996    
                                                                            ------------------------------- 
                                                                                     (UNAUDITED)        
<S>                                                                         <C>             <C> 
CASH FLOWS FROM OPERATING ACTIVITIES                                    
Net loss                                                                    $     (3,106)   $    (4,574)
Adjustments to reconcile net loss to net cash provided                  
     by (used in) operating activities:                                 
     Depreciation                                                                  1,216            559
     Amortization                                                                     20             20
     Changes in operating assets and liabilities:                                 
     (Increase) in prepaid expenses and other current assets                        (547)          (664)
     (Increase) decrease in other assets                                             314           (111)
     Increase in accounts payable                                                     88            517 
     (Decrease) in accrued liabilities                                              (108)          (250)
     Increase (decrease) in deferred revenue                                      (2,460)         6,738  
                                                                            ------------------------------- 
Net cash provided by (used in) operating activities                               (4,583)         2,235
                                                                        
CASH FLOWS FROM INVESTING ACTIVITIES                                    
Capital expenditures                                                              (2,934)        (4,802)
Purchase of marketable securities                                                (53,174)       (52,697)
Proceeds from sales of marketable securities                                      45,453         36,021
                                                                            ------------------------------- 
Net cash used in investing activities                                            (10,655)       (21,478)
                                                                        
CASH FLOWS FROM FINANCING ACTIVITIES                                    
Net proceeds from issuance of common stock                                         4,341         18,637
Increase in notes payable                                                                         1,344
Repayments of notes payable                                                         (359)          (264)
                                                                            ------------------------------- 
Net cash provided by financing activities                                          3,982         19,717
                                                                            ------------------------------- 
Increase (decrease) in cash and cash equivalents                                 (11,256)           474
Cash and cash equivalents at beginning of period                                  17,059         28,612
                                                                            ------------------------------- 
Cash and cash equivalents at end of period                                  $      5,803    $    29,086
                                                                            ===============================
</TABLE> 

        See accompanying notes to these unaudited financial statements.

                                      -5-
<PAGE>
 
                              PHARMACOPEIA, INC.

                         NOTES TO FINANCIAL STATEMENTS
                                  (UNAUDITED)


NOTE (1)-- BASIS OF PRESENTATION

     The unaudited financial statements have been prepared in accordance with 
generally accepted accounting principles for interim financial information. 
Accordingly, they do not include all of the information and footnotes required 
by generally accepted accounting principles for complete financial statements. 
In the opinion of management, all adjustments (consisting of normal recurring 
accruals) considered necessary for a fair presentation have been included. 
Interim results are not necessarily indicative of the results that may be 
expected for the year. For further information, refer to the financial 
statements and footnotes thereto included in the Company's Annual Report on Form
10-K for the year ended December 31, 1996.

NOTE (2)-- NET LOSS PER COMMON SHARE

     Net loss per common share is based on net loss for the relevant period 
divided by the weighted average number of shares issued and outstanding during 
the period. Stock options and common stock issuable upon conversion of warrants 
are not reflected as their effect would be antidilutive for both primary and 
fully diluted earnings per share computations.

     In February 1997, the Financial Accounting Standard Board issued Statement 
No. 128, Earnings per Share, which is required to be adopted on December 31, 
1997. At that time, the Company will be required to change the method currently 
used to compute earnings per share and to restate all prior periods. The impact 
of statement 128 on the calculation of primary and fully diluted earnings per 
share is not expected to be material.

                                      -6-
<PAGE>
 
ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS 
        OPERATIONS

OVERVIEW

     Pharmacopeia, Inc. ("Pharmacopeia" or the "Company") was incorporated in 
March 1993 and is engaged in research and development and chemical library 
production for collaborations and for its own use. The Company's research and 
development has focused on efficient, cost effective, high throughput systems 
for synthesizing and screening large libraries of chemicals for new drug 
discovery and optimization. The Company has incurred losses since inception and,
as of June 30, 1997 had an accumulated deficit of $30.9 million. The Company 
anticipates incurring additional losses over at least the next several years as 
it expands its research and development and chemical library production efforts.
The Company expects that its losses will fluctuate from quarter to quarter and
that such variations may be substantial.

RESULTS OF OPERATIONS

     The Company expects that its revenue sources for at least the next several 
years will be limited to future drug discovery collaboration payments from 
Schering Corporation and Schering-Plough Ltd. (together, "Schering-Plough"), 
Berlex Laboratories, Inc. ("Berlex"), Novartis Corporation ("Novartis"), Bayer 
Corporation ("Bayer"), Daiichi Pharmaceutical Co., Ltd. ("Daiichi"), and Akzo 
Nobel/Organon ("Organon") and from other customers under existing arrangements 
and others that may be entered into in the future. The timing and amounts of 
such revenues, if any, will likely fluctuate. Historical results should not be 
viewed as indicative of future operating results. The Company will be required 
to conduct significant research, development and production activities during 
the next several years to fulfill its obligations under the Schering-Plough, 
Berlex, Novartis, Bayer, Daiichi and Organon drug discovery collaborative 
agreements and to develop other collaborations and technologies. The Company
does not anticipate having net income in the next several years.

THREE AND SIX MONTHS ENDED JUNE 30, 1997 AND 1996

     Revenues for the three and six months ended June 30, 1997 increased to $5.6
million and $11.5 million, respectively, compared to $2.8 million and $4.9 
million for the comparable periods in 1996. The increase in 1997 revenues 
primarily reflects expanded efforts in the drug discovery collaborations with 
Bayer, Daiichi, Organon and Novartis and the achievement of certain milestones 
with Berlex and Schering-Plough during the first quarter of 1997.

                                      -7-
<PAGE>
 
     Research and development expenses increased to $7.0 million and $13.9 
million for the three and six months ended June 30, 1997, respectively, compared
to $4.6 million and $8.6 million for the corresponding periods in 1996. These 
increased amounts primarily reflect increased salaries and personnel expenses as
the Company continued to hire additional research and development personnel, 
equipment depreciation, leasehold amortization, and laboratory supplies
purchased in connection with the expansion of the Company's chemical library
production and screening efforts for drug discovery collaborations and for
internal discovery programs.

     General and administrative expenses increased to $1.3 million and $2.8 
million for the three and six months ended June 30, 1997, respectively, compared
to $1.2 million and $2.6 million for the same periods in 1996. The increase is 
primarily attributable to increased payroll and personnel expenses as the 
Company continued to hire additional management and administrative personnel, 
along with increased patent legal fees.

     The Company had interest income of $1.1 million and $2.2 million in the 
three and six months ended June 30, 1997, respectively, compared to $1.0 million
and $1.9 million for the comparable periods in 1996. The increase in interest
income resulted from higher average balances of cash, cash equivalents and
marketable securities. Interest expense for both periods is a result of interest
incurred on notes payable.

LIQUIDITY AND CAPITAL RESOURCES

     As of June 30, 1997, the Company had working capital of $44.2 million. The 
Company has funded its activities through June 30, 1997 primarily through the 
sale of equity securities and funding under collaborative arrangements. From 
inception through June 30, 1997, the Company received $101.9 million in net 
proceeds from equity financing and received $42.3 million in research and 
development, license fees and milestone payments under collaborative agreements.

     The Company's funds are currently invested in U.S. Treasury and government 
agency obligations, investment grade commercial paper and other short-term money
market instruments. The Company may also invest such proceeds in investment 
grade, interest-bearing securities having a maximum maturity of two years. As of
June 30, 1997, the Company's cash and cash equivalents totaled $5.8 million. 
In addition, the Company had marketable securities of $72.1 million.

     In connection with the Company's agreement with the Trustees of Columbia 
University and Cold Spring Harbor Laboratory, the Company is required to pay 
annual license fees. The Company is also required to pay to Columbia University 
certain royalties.

     In addition, as of June 30, 1997, the Company had outstanding commitments 
for construction and equipment purchases totaling $0.7 million. The Company 
anticipates that its capital requirements will continue at approximately the 
same level over the next two years as the Company expands it research and 
development activities. In connection with such expansion, the Company expects 
to incur substantial expenditures for hiring additional management, scientific 
and administrative personnel and for planned expansion and upgrading of its 
facilities, including acquisition of additional equipment.

                                      -8-
<PAGE>
 
     The Company anticipates that its existing capital resources will be 
adequate to fund the Company's operations at least through 1998. There can be no
assurance that changes will not occur that would consume available capital 
resources before such time. The Company's capital requirements depend on 
numerous factors, including the ability of the Company to enter into additional 
collaborative arrangements, competing technological and market developments, 
changes in the Company's existing collaborative relationships, the cost of 
filing, prosecuting, defending and enforcing patent claims and other 
intellectual property rights, the purchase of additional capital equipment, 
acquisitions of other businesses or technologies, the progress of the Company's 
drug discovery programs and the progress of the Company's customers' milestone 
and royalty producing activities. There can be no assurance that additional 
funding, if necessary, will be available on favorable terms, if at all. The 
Company's forecasts of the period of time through which its financial resources 
will be adequate to support its operations is forward looking information, and 
actual results could vary. The factors described earlier in this paragraph will 
impact the Company's future capital requirements and the adequacy of its 
available funds.

                                      -9-
<PAGE>
 
                                    PART II

                               OTHER INFORMATION

     ITEM 2. CHANGES IN SECURITIES

                   Transaction                   Number of       Aggregate
                       Date      Securities   Securities (1)  Offering Price
                  ------------  ------------  --------------  --------------
       Organon    May 31, 1997  Common Stock     276,707        $4,165,000

     (1)  Transaction exempt from the registration requirements of Section 5 of
          the Securities Act of 1933, as amended, by virtue of the exemption
          contained in Section 4(2) of such act.

     ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

(a)  The Annual Meeting of Stockholders was held on May 9, 1997.

(b)  The following persons were elected to continue as the directors of the 
     Company:

                              FOR             AGAINST
                            ---------      ------------
          Frank Baldino     8,297,824         46,581
          Edith W. Martin   8,297,554         46,851
          Max Wilhelm       8,297,824         46,581

     and the following persons are incumbent directors whose terms of office 
     continued after the Annual Meeting:

                              Joseph A. Mollica
                              Gary E. Costley
                              W. Clark Still
                              Samuel D. Colella
                              Eileen M. More

(c)  The other matters voted upon and the results of the voting were as follows:

     (1)  The stockholders voted 7,924,605 shares for and 401,651 shares against
          the proposal to approve an amendment to the Company's 1994 Incentive
          Stock Plan to increase the number of shares of Common Stock received
          for issuance by 500,000 shares. Stockholders holding an aggregate of
          18,149 shares abstained from voting on this matter.

                                     -10-
<PAGE>
 
(2)  The stockholders voted 8,335,362 shares for and 6,418 shares against the
     proposal to confirm the appointment of Ernst & Young, LLP as independent
     auditors for the 1997 fiscal year. Stockholders holding an aggregate of
     2,625 shares abstained from voting on this matter.

(3)  A separate tabulation of the votes cast for each director are set forth 
     under Item 4(b) above.

There were no broker non-votes on the forgoing matters.

                                     -11-
<PAGE>
 
     ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

(a)  Exhibits:

3.1******           Restated Certificate of Incorporation of the Registrant.
3.3******           Bylaws of the Registrant, as amended.
4.3*                Stockholders Rights Agreement, dated February 15, 1995.
10.1*               Series A and Series B Preferred Stock Purchase Agreement, 
                    dated July 21, 1993.
10.2*               Series B Preferred Stock Purchase Agreement, dated March 11,
                    1994.
10.3*               Series C Preferred Stock Purchase Agreement, dated December 
                    22, 1994.
10.4*               Series D Preferred Stock Purchase Agreement, dated February 
                    15, 1995.
10.5**diamond       Amended 1994 Incentive Stock Plan.
10.5(a)diamond      Amended No. 3 to the 1994 Incentive Stock Plan dated May 9, 
                    1997.
10.6*diamond        1995 Employee Stock Purchase Plan.
10.7*diamond        1995 Director Option Plan.
10.8*+              Library Collection Agreement, dated as of October 1, 1995, 
                    between Pharmacopeia and Sandoz Pharma Ltd.
10.9*+              Research, License, and Royalty Agreement, dated as of
                    February 15, 1995, between Pharmacopeia and Berlex
                    Laboratories, Inc.
10.9(a)++           Amendment No. 1 to Research, License and Royalty Agreement
                    between the Company and Berlex Laboratories, Inc. dated
                    November 27, 1996.
10.9(b)++           Amendment No. 2 to Research, License and Royalty Agreement
                    between the Company and Berlex Laboratories, Inc. dated
                    June 30, 1997.
10.10*+             License Agreement, dated as of October 6, 1995, among
                    Pharmacopeia, the Trustees of Columbia University in the
                    City of New York and Cold Spring Harbor Laboratory.
10.11*+             Collaboration Agreement, dated as of December 22, 1994,
                    between Pharmacopeia and Schering Corporation and Schering-
                    Plough, Ltd.
10.11(b)++          Amendment No. 2 to Collaboration Agreement and Random
                    Library Agreement between the Company and Schering
                    Corporation and Schering-Plough, Ltd. dated as of April 22,
                    1996.
10.11(c)++          Amendment No. 3 to Collaboration Agreement and Random
                    Library Agreement between the Company and Schering
                    Corporation and Schering-Plough, Ltd. dated as of April 21,
                    1997.
10.12*+             Random Library Agreement, dated as of December 22, 1994,
                    between Pharmacopeia and Schering Corporation and Schering-
                    Plough, Ltd.
10.13*              Lease Agreement between Pharmacopeia and Eastpark at 8A.
10.13(a)**          Amendment dated as of January 22, 1996 to Lease Agreement 
                    between Pharmacopeia and Eastpark at 8A.
10.13(b)****        Third Amendment to Lease Agreement dated March 31, 1996 
                    between Pharmacopeia and Eastpark at 8A.
10.14*              Sublease, dated as of December 7, 1994, between Pharmacopeia
                    and Enichem Americas, Inc.
10.15*              Lease, dated as of May 2, 1994, between Pharmacopeia and 
                    College Road Associates Limited, as amended.
10.15(a)**          Lease, dated as of December 1, 1995, between Pharmacopeia
                    and College Road Associates, as amended.
10.15(b)****        Third Execution and Modification of lease dated June 7,
                    1996, between Pharmacopeia and College Road Associates
                    Limited.

                                     -12-
<PAGE>
 
10.17*diamond       Employment Agreement, dated October 4, 1994, between the 
                    Company and Lewis J. Shuster.
10.18*diamond       Employment Agreement, dated January 18, 1994, between the 
                    Company and Joseph A. Mollica, Ph.D.
10.19*diamond       Employment Agreement, dated May 18, 1993, between the 
                    Company and John C. Chabala, Ph.D.
10.20*diamond       Employment Agreement, dated June 3, 1993, between the 
                    Company and John J. Baldwin, Ph.D.
10.21*diamond       Employment Agreement, dated December 2, 1993, between the 
                    Company and Nolan H. Sigal, M.D., Ph.D.
10.22*diamond       Consulting Agreement, dated April 30, 1993, between the 
                    Company and W. Clark Still, Ph.D.
10.23*              Warrant to purchase Common Stock issued to Columbia 
                    University.
10.24*              Warrant to purchase Common Stock issued to Cold Spring 
                    Harbor Laboratory.
10.25**+            Collaboration Agreement effective as of December 31, 1995 
                    between Pharmacopeia and Bayer 
10.26**+            Random Library Agreement effective as of December 31, 1995 
                    between Pharmacopeia and Bayer
10.29**diamond      Employment Agreement, dated January 24, 1996, between the 
                    Company and Nancy M. Gray, Ph.D.
10.30***+           Collaborative Agreement dated as of March 29, 1996 with 
                    Daiichi Pharmaceutical Co., Ltd.
10.30(a)++          Amendment No. 1 to Collaboration Agreement between the
                    Company and Daiichi Pharmaceutical Co. Ltd, dated April 14,
                    1997.
10.31****+          Research Agreement, between Pharmacopeia, Inc. and N.V. 
                    Organon dated May 31, 1996
10.32*****diamond   Employment Agreement, dated June 20, 1996, between the 
                    Company and Stephen A. Spearman, Ph.D.
10.33*****          Lease Agreement, dated June 21, 1996, between Pharmacopeia 
                    and South Brunswick Rental I, Ltd.
11.1*               Statement re Computation of Per Share Earnings.
27.1                Financial Data Schedule
27.2                Amended Financial Data Schedule

_______________________

*Incorporated by reference to the same numbered exhibit filed with the Company's
Registration Statement on Form S-1 No. 33-93460.
**Incorporated by reference to the same numbered exhibit filed with the 
Company's Form 10-K for the year ended December 31, 1995.
***Incorporated by reference to the same numbered exhibit filed with the 
Company's Form 10-Q for the quarter ended March 31, 1996.
****Incorporated by reference to the same numbered exhibit filed with the 
Company's Form 10-Q for the quarter ended June 30, 1996.
*****Incorporated by reference to the same numbered exhibit filed with the 
Company's Form 10-Q for the quarter ended September 30, 1996.
******Incorporated by reference to the same numbered exhibit filed with the 
Company's Form 10-K for the year ended December 31, 1996.
+Confidential treatment granted.
++Confidential treatment requested.
(Diamond) Represents a management contract or compensatory plan or arrangement.

(b)  Reports on Form 8-K

          None

                                     -13-
<PAGE>
 
                                  SIGNATURES


     Pursuant to the requirements of the Securities Exchange Act of 1934, the 
Registrant has duly caused this report to be signed on its behalf by the 
undersigned, thereunto duly authorized.


                                     PHARMACOPEIA, INC.


                                     By: /s/ LEWIS J. SHUSTER
                                         -------------------------------


                                         Lewis J. Shuster
                                         Executive Vice President, Corporate   
                                         Development & Chief Financial Officer
                                         (Duly Authorized Officer and Chief   
                                            Accounting Officer)                 


                                     Date:  August 12, 1997
   
                                     -14-
<PAGE>
 
                              PHARMACOPEIA, INC.
                               INDEX TO EXHIBITS


EXHIBIT NUMBER EXHIBIT NAME                                                 PAGE

     10.5 (a)  Amendment No. 3 to the 1994 Incentive Stock Plan dated May 9, 
               1997.
            
     10.9 (a)  Amendment No. 1 to Research, License and Royalty Agreement
               between the Company and Berlex Laboratories, Inc. dated November
               27, 1996.
            
     10.9 (b)  Amendment No. 2 to Research, License and Royalty Agreement
               between the Company and Berlex Laboratories, Inc. dated June 30,
               1997.

     10.11(b)  Amendment No.2 to Collaboration Agreement and Random Library
               Agreement between the Company and Schering Corporation and
               Schering-Plough, Ltd. dated as of April 22, 1996.

     10.11(c)  Amendment No. 3 to Collaboration Agreement and Random Library
               Agreement between the Company and Schering Corporation and
               Schering-Plough, Ltd. dated as of April 21, 1997.

     10.30(a)  Amendment No.1 to Collaboration Agreement between the Company and
               Daiichi Pharmaceutical Co., Ltd. dated April 14, 1997.

      27.1     Financial Data Schedule

                                     -15-


<PAGE>
 
                 PHARMACOPEIA, INC. 1994 INCENTIVE STOCK PLAN

                                Amendment No. 3
                                ---------------

     Pursuant to the power reserved to it in Section 14 of the Pharmacopeia, 
Inc. 1994 Incentive Stock Plan, as amended (the "Plan"), the Board of Directors 
of Pharmacopeia, Inc. hereby amends the Plan as follows:

     1.   The first sentence of Section 3(a) is hereby amended and restated to 
          read as follows:

          "Subject to the provisions of Section 12 of the Plan, the maximum
          aggregate number of shares under the Plan is 1,750,000 shares of
          Common Stock. The Shares may be authorized, but unissued, or
          reacquired Common Stock."

     2.   This Amendment No. 3 to the Plan shall be effective only after 
approval of a majority of the Company's stockholders as set forth in Section 14.

     To record the adoption of this Amendment No. 3, the Company has caused its 
authorized officers to affix its corporation name and seal this 9th day of May, 
1997.


CORPORATE SEAL                               PHARMACOPEIA, INC.



Attest: /s/ LEWIS J. SHUSTER                 By: /s/ JOSEPH A. MOLLICA
       ---------------------                    ----------------------
       Lewis J. Shuster,                        Joseph A. Mollica,
       Secretary                                Chairman, President, and
                                                Chief Executive Officer

<PAGE>
 
          AMENDMENT NO. 1 TO RESEARCH, LICENSE AND ROYALTY AGREEMENT

     This Amendment No. 1 to Research, License and Royalty Agreement (the 
"Amendment") effective as of November 27, 1996, is entered into by and between 
Pharmacopeia, Inc. ("Pharmacopeia") and Berlex Laboratories, Inc. ("Berlex"), 
and amends that certain Research, License and Royalty Agreement entered into by 
Pharmacopeia and Berlex effective as of February 15, 1995 (the "Agreement").

1.   All capitalized terms not defined in this Amendment shall have the meanings
     given to them in the Agreement.

2.   Section 3.2(b) is amended to read in its entirety as follows:

     (b)  Addition of Berlex Target.
          -------------------------

          (i)    Following [***] after the Effective Date, the Parties shall 
initiate discussions regarding the addition of a new target as an Additional 
Berlex Target, and an expansion of the Field to include such Additional Berlex 
Target. In connection with such discussions, the Parties shall promptly meet to 
(i) discuss a written Research Plan for any proposed Additional Berlex Target, 
including without limitation, the number of FTE research positions for the 
Research Plan, (ii) define the Field for such Additional Berlex Target, and 
(iii) define criteria for the specificity and potency of a Lead Compound, and 
agree on whether an appropriate in vivo model exists for the Additional Berlex 
                                -- ---
Target.


          (ii)   If the Parties fail to agree on a proposed target as an 
Additional Berlex Target by [***], Pharmacopeia will continue to conduct 
research in accordance with the Research Plan in the initial Field, but shall 
have no obligation to conduct research with respect to any proposed Additional 
Berlex Target. In such event, the Term and the research on the Initial Berlex 
Target shall terminate on [***], an in the period between [***], and [***],
Berlex shall pay to Pharmacopeia [***] research payments that would otherwise be
due during such period pursuant to Section 5.2 below.

          (iii)  If on or before [***] the parties agree on a proposed target as
an Additional Berlex Target, then Berlex shall pay to Pharmacopeia research 
payments for support of a Research Plan as set forth in Section 5.2 below. In 
such event, prior to [***], the Parties shall negotiate in good faith and agree 
on additional research payments, the milestone payments, royalties and other 
amounts to be paid by Berlex to Pharmacopeia with regard to the Additional 
Berlex Target, and on any amendments to the Agreement with regard to the 
Additional Berlex Target, and on any amendments to the Agreement with regard to 
the Additional Berlex Target pursuant to Sections 3.2(e) and 5.2.


*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
3.   Section 5.1 is amended to read in its entirety as follows:

     5.1  Term. Subject to Section XIV, and Sections 2.2, 3.2 and 3.5, the Term 
          ----
     of this Agreement shall extend until [***] from the Effective Date. The
     Term may be extended with the written agreement of the Parties.

4.   Section 5.2 is amended to read in its entirety as follows:

     5.2  Payment. Subject to the delivery of each quarterly written report from
          -------
     Pharmacopeia to Berlex referred to in Section 3.1 pursuant to the Research
     Plan, Berlex shall pay Pharmacopeia a total of [***] in research payments
     as follows:

          (a)  [***] on the Effective Date.

          (b)  [***] within [***] of the Effective Date.

          (c)  [***] within [***] of the Effective Date.

          (d)  [***] within [***] of the Effective Date.

          (e)  [***] within [***] of the Effective Date.

          (f)  [***] within [***] of the Effective Date.

          (g)  [***] within [***] of the Effective Date.

          (h)  [***] within [***] of the Effective Date.

          (i)  [***] within [***] of the Effective Date.
     
          (j)  [***] within [***] of the Effective Date.

          (k)  [***] within [***] of the Effective Date.

          (l)  [***] within [***] of receipt of the final written report on the 
               research done pursuant to the Research Plan.

5.   Except as specifically modified or amended hereby, the Agreement shall
     remain in full force and effect and, as modified or amended, is hereby
     ratified, confirmed and approved. No provision of this Amendment may be
     modified or amended except expressly in a writing signed by both parties
     nor shall any terms be waived except expressly in a writing signed by the
     party charged therewith. This Amendment shall be governed in accordance
     with the laws of the State of Delaware, without regard to principles of
     conflicts of laws.


*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
     IN WITNESS WHEREOF, each of the parties has executed this Amendment as of 
the date indicated on this Amendment.


BERLEX LABORATORIES, INC.                    PHARMACOPEIA, INC.           
                                                                         
                                                                         
                                                                         
By:________________________                  By:________________________ 
                                                                         
Name:______________________                  Name:______________________ 
                                                                         
Title:_____________________                  Title:_____________________ 
                                                                         
Date:______________________                  Date:______________________  

<PAGE>

                                                                 EXHIBIT 10.9(B)
 
          AMENDMENT NO. 2 TO RESEARCH, LICENSE AND ROYALTY AGREEMENT


     This Amendment No. 2 to Research, License and Royalty Agreement (the 
"Amendment") effective as of June 30, 1997, is entered into by and between 
Pharmacopeia, Inc. ("Pharmacopeia") and Berlex Laboratories, Inc. ("Berlex"), 
and amends that certain Research, License and Royalty Agreement entered into by
Pharmacopeia and Berlex effective as of February 15, 1995 (the "Agreement"), as 
amended by Amendment No. 1 to Research, License and Royalty Agreement effective 
as of November 27, 1996.

1.   All capitalized terms not defined in this Agreement shall have the meanings
     given to them in the Agreement.

2.   Section 1.3 is amended to read in its entirety as follows:

     1.3   "Additional Berlex Target" shall mean [***].

3.   Section 1.17 is amended to read in its entirety as follows:

     1.17  "Field" means the use for the prevention, mitigation, or cure of 
     diseases of any substance which [***].

4.   Section 1.36 is amended to read in its entirety as follows:

     1.36  "Other Product" means any drug with activity with respect to the
     Initial Berlex Target approved for human or animal use that is not a
     Product (i.e., not based on a Development Compound accepted as an Accepted
     Development Compound in accordance with Section 6.1(b)) and is within the
     scope of a Live Claim. It is understood that a drug meeting the criteria of
     the preceding sentence and that also has biological activity outside the
     Field (i.e. via a different mechanism of action) shall be an Other Product
     only if such drug has an activity (Ki) in the Field of less than [***].

5.   Section 1.39 is amended to read in its entirety as follows:

     1.39 "Product" means any drug with activity within the Field approved for
     human or animal use based on a Development Compound that has received
     Acceptance in accordance with Section 6.1(b) and is within the scope of a
     Live Claim, or a Derivative thereof. It is understood that a drug meeting
     the criteria of the preceding sentence which also has biological activity
     outside the Field (i.e., via a different mechanism of action) shall be a
     Product.

*Information omitted and filed separately with the Commission under Rule 24b-2.

<PAGE>
 
6.   Section 2.2 is amended to read in its entirety as follows:

     2.2 Number of Scientists. Berlex is making the payments described in
     Section V based on the requirement that Pharmacopeia shall provide an
     average of [***] full-time equivalent ("FTE") research positions.

7.   In Section 3.5, the phrase "Chief Scientific Officer for Pharmacopeia"
     shall be replaced with "Senior Vice President of Drug Discovery for
     Pharmacopeia."

8.   In Section 3.7, the phrase "Chief Scientific Officer for Pharmacopeia" 
     shall be replaced with "Senior Vice President, Chemistry, of Pharmacopeia."

9.   Section 4.8 is amended to read in its entirety as follows:

     4.8  Random Libraries.
          -----------------

          (a)  For a period of [***] under the Research Plan with respect to the
               Initial Berlex Target, Pharmacopeia shall not knowingly screen
               Random Libraries with respect to the Initial Berlex Target, nor
               shall Pharmacopeia knowingly (i) design Random LIbraries for the
               purpose of identifying compounds with activity for the Initial
               Berlex Target, (ii) make such Random Libraries, or (iii) use or
               sell such Random Libraries to Third Parties or, (iv) use any
               structure-function data learned as a result of the research under
               the Research Plan for the purposes of subsections (i)-(iii)
               above.

          (b)  For a period of [***} years from the end of the Term, or in the
               event research under the Research Plan with respect to the
               Additional Berlex Target does not proceed until [***], 
               until[***], Pharmacopeia shall not knowingly screen Random
               Libraries with respect to the Additional Berlex Target, nor shall
               Pharmacopeia knowingly (i) design Random Libraries for the
               purpose of identifying compounds with activity for the Additional
               Berlex Target, (ii) make such Random Libraries, or (iii) use or
               sell such Random Libraries to Third Parties or, (iv) use any
               structure-function data learned as a result of the research under
               the Research Plan for the purposes of subsections (i)-(iii)
               above.

          (c)  It is understood that at any time Pharmacopeia may otherwise make
               and provide Random Libraries to Third Parties who may screen such
               Random Libraries against any targets, including without
               limitation, the Initial Berlex Target and Additional Berlex
               Target without the knowledge of Pharmacopeia.

*Information omitted and filed separately with the Commission under Rule 24b-2.

<PAGE>
 
10.  Section 4.14 is amended to read in its entirety as follows:

     4.14   Commercialization Status.  If Berlex is developing a Product or 
            ------------------------       
            Other Products, for a period from the end of the Term to the First
            Commercial Sale of a Product or Other Product, Berlex shall keep
            Pharmacopeia informed of its development activities with respect to
            Products and Other Products, including without limitation, the
            achievement of the milestones set forth in Section 6.1 and 6.2 and
            the commercialization of Products and Other Products, by semi-
            annually providing Pharmacopeia with a written report stating the
            status of development of each such Product and Other Product. If
            research under the Research Plan with respect to the Additional
            Berlex Target does not proceed until [***] and if, at any time,
            Berlex fails to use diligent efforts to actively develop and
            commercialize any Product having activity with respect to the
            Additional Berlex Target, or does not cure any breach with respect
            to such Product noticed by Pharmacopeia pursuant to Section 14.2(a)
            herein within the time permitted thereunder, thereafter Berlex's
            rights under Sections 4.5 and 4.9 herein shall terminate worldwide
            with respect to such Product, as well as with respect to any Focused
            Libraries, Lead Compounds, and Development Compounds from which such
            Product was developed. However, notwithstanding the preceding
            sentence, Berlex can maintain such rights under Section 4.5 and 4.9
            (i.e., such rights shall not terminate) for successive twelve-month
            periods by paying to Pharmacopeia a license maintenance fee of [***]
            per twelve-month period, payable no later than thirty (30) days
            after the commencement of each such twelve-month period.

11.  Section 5.1 is amended to read in its entirety as follows:

     5.1    Term.
            ---- 

            (a)     Subject to Article XIV and Sections 3.2 and 3.5 (as amended
                    herein), the Term of the research activities under the
                    Research Plan shall extend until [***] from the Effective
                    Date. The Term may be further extended with the written
                    agreement of the Parties.
 
            (b)     Berlex shall, at least [***] prior to the end of the Term,
                    notify Pharmacopeia in writing whether Berlex wishes to
                    negotiate an extension of the Term. Such written notice
                    shall include at least the following information: (i)
                    whether Berlex wishes to continue conducting research in the
                    Field or wishes to conduct research with respect to
                    additional or different targets, (ii) an indentification of
                    any such proposed additional or different targets, (iii) the
                    length of the proposed extended Term, and (iv) the proposed
                    amount of funding for such extending Term.

*Information omitted and filed separately with the Commission under Rule 24b-2





  
<PAGE>
 
               (c)  (i) Berlex shall make a payment to Pharmacopeia, in addition
                    to the payments due under Section 5.2, on or before the last
                    day of the Term (the "Wind-Down Payment"). The amount of the
                    Wind-Down Payment shall be [***]. In the event Berlex fails
                    to provide Pharmacopeia written notice as provided under
                    Section 5.1(b), then the amount of the Wind-Down Payment
                    shall be increased to [***].

     (ii) In exchange for the Wind-Down Payment, Pharmacopeia shall provide such
                    number of FTEs as the Research Committee reasonably agrees,
                    in order to complete certain activities previously commenced
                    pursuant to the Research Plan.

12.  Section 5.2 is amended to read in its entirety as follows:

     5.2  Payment. Subject to the delivery of each quarterly written report from
          -------
     Pharmacopeia to Berlex referred to in Section 3.1 pursuant to the Research
     Plan, Berlex shall pay Pharmacopeia research payments as follows:

          (a)  [***] on the Effective Date.

          (b)  [***] within [***] of the Effective Date. 

          (c)  [***] within [***] of the Effective Date.  

          (d)  [***] within [***] of the Effective Date.  
          
          (e)  [***] within [***] of the Effective Date.  

          (f)  [***] within [***] of the Effective Date.  

          (g)  [***] within [***] of the Effective Date.  

          (h)  [***] within [***] of the Effective Date.  

          (i)  [***] within [***] of the Effective Date.  
          
          (j)  [***] within [***] of the Effective Date.  

          (k)  [***] within [***] of the Effective Date.  
          
          (l)  [***] within [***] of receipt of the final written report on the 
               research done pursuant to the Research Plan.

*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
     All payments made pursuant to this Section 5.2 shall be non-refundable, but
     payments under Section 5.2(k) and (l) may be creditable against the Wind-
     Down Payment [***].

13.  Section 6.1(a)(ii) is amended to read in its entirety as follows:

          (ii) [***] upon the initiation of GLP toxicity studies for each
          Development Compound for which Berlex decides to develop a Separate
          Indication and which is a Distinct Molecule from other Accepted
          Development Compounds; provided, however, that the Milestone Payment
          provided in this Section 6.1(a)(ii) is not due and payable for a given
          Development Compound if (i) with respect to a Development Compound
          having activity against the Additional Berlex Target, research under
          the Research Plan with respect to the Additional Berlex Target has
          proceeded until at least [***], and (ii) with respect to a Development
          Compound having activity against either the Initial Berlex Target or
          the Additional Berlex Target, at least one Accepted Development
          Compound has not been provided to Berlex by Pharmacopeia so as to
          enable Berlex to initiate GLP toxicity studies within [***] from the
          start of research by Pharmacopeia with respect to the applicable
          Berlex target (the "Start Date"). The Start Date will be determined by
          the Research Committee with respect to the Initial Berlex Target and
          the Additional Berlex Target, respectively, and stated in the first
          quarterly research report following such Start Date.

14.  Section 6.1(b) is amended to read in its entirety as follows:

     (b)  Acceptance of Development Compounds. The "Acceptance" of each
          -----------------------------------
          Development Compound to become an "Accepted Development Compound"
          shall be determined by the Research Committee in good faith based on
          criteria set forth in the Research Plan. Notwithstanding the above, in
          the event that research under the Research Plan with respect to the
          Additional Berlex Target does not proceed until [***] or the Research
          Committee no longer exists, then "Acceptance" for a particular
          Development Compound shall be deemed to have occurred on the date when
          Berlex initiates [***] based on the applicable Lead Compound or
          Development Compound.

15   The first nine (9) lines of Section 6.2 (comprising the introductory 
     paragraph thereof) are deleted and replaced with the following:

*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
     6.2  Milestones on Other Products. If Pharmacopeia fails to provide Berlex
          ----------------------------
     a Development Compound having activity against the Initial Berlex Target
     within [***] years of the Start Date, but provides Berlex with a Lead
     Compound within the Term, and Berlex initiates GLP toxicity studies on such
     Lead Compound or a compound Derived therefrom after the Effective Date, and
     such Lead Compound or a compound Derived therefrom becomes an intended
     Other Product or an Other Product, then Berlex shall pay to Pharmacopeia
     Milestone Payments with respect to such Other Product or intended Other
     Product as follows:

16.  Section 6.5 is amended to read in its entirety as follows:

     6.5  No Obligations for Non-Products. It is understood that Berlex is in
          -------------------------------
     the Business of developing products for the prevention, treatment, cure and
     mitigation of diseases in animals and that Berlex has extensive research
     programs independent of Pharmacopeia. Pharmacopeia acknowledges that Berlex
     has no obligations to pay Pharmacopeia royalties for a product in the Field
     which Berlex independently researched, developed and commercialized, either
     alone or in conjunction with Third Parties, without the use of or reliance
     on Developed Technology or Pharmacopeia Base Technology, as shown by
     written records kept in the ordinary course of business consistent with
     pharmaceutical industry standards (a "Non-Product"). Unless, with respect
     to a particular putative Non-Product, Berlex has not initiated GLP
     toxicity studies within the periods set forth in Sections 6.1(a) or 6.2(b)
     if applicable, within thirty (30) days of the filing of an IND with respect
     to each Non-Product for which Berlex believes no royalties and/or Milestone
     Payments are due Pharmacopeia, Berlex shall notify Pharmacopeia of such
     filing, and shall, to the extent it may do so without breaching any
     contractual or other legal obligation, provide Pharmacopeia with a
     statement explaining why Berlex believes the Non-Product was independently,
     researched, developed and commercialized, either alone or in conjunction
     with Third Parties without the use of or reliance on Developed Technology
     or Pharmacopeia Base Technology and is independent of Berlex's activities
     under the Research Plan. Berlex is not required to provide written records
     referred to above at the time providing such statement, but may have to
     provide such records pursuant to Section 15.19. Such Information shall be
     deemed Berlex confidential Information pursuant to this Agreement.

17.  The first ten (10) lines of Section 7.3 (comprising the introductory 
     paragraph thereof) are deleted and replaced with the following:

     7.3  Royalties on Other Products. If Pharmacopeia fails to provide Berlex
          ---------------------------
     an Accepted Development Compound having activity against the Initial Berlex
     Target within [***] years of the Start Date, but provides Berlex with a
     Lead Compound within the Term, and Berlex initiates GLP toxicity studies on
     such Lead Compound or a compound Derived therefrom after the Effective
     Date, and such Lead Compound or a compound Derived

<PAGE>
 
          therefrom becomes an Other Product, then Berlex shall pay to
          Pharmacopeia royalties with respect to such Other Product for a
          Separate Indication and which is a Distinct Molecule from any other
          Products or Other Products, as set forth below:

     18.  Section 14.2 is amended by the deletion of subsection 14.2(d).

     19.  Except as specifically modified or amended hereby, the Agreement shall
          remain in full force and effect and, as modified or amended, is hereby
          ratified, confirmed and approved. No provision of this Amendment may
          be modified or amended except expressly in a writing signed by both
          parties nor shall any terms be waived except expressly in a writing
          signed by the party charged therewith. This Amendment shall be
          governed in accordance with the laws of the State of Delaware, without
          regard to principles of conflicts of laws.

          IN WITNESS WHEREOF, each of the parties has executed this Amendment as
     of the date indicated on this Amendment.

     BERLEX LABORATORIES, INC.                 PHARMACOPEIA, INC.

     By:______________________                 By:_____________________

     Name:____________________                 Name:___________________
          
     Title:___________________                 Title:__________________

     Date:____________________                 Date:___________________

<PAGE>
 
                                                                EXHIBIT 10.11(B)

                                AMENDMENT NO. 2

     This Amendment No. 2 ("Amendment") to the Collaboration Agreement and the 
Random Library Agreement effective December 22, 1994 between the parties hereto 
(the "Agreements") is effective as of April 22, 1996, (the "Effective Date") and
by agreement of the parties as of the Effective Date amends the Agreements as 
follows:

1.   All capitalized terms herein shall have the same meaning as in the 
Agreements.

2.   This Agreement sets forth the terms on which Pharmacopeia will provide to 
Schering the [***] Libraries prepared by Pharmacopeia pursuant to the 
Collaboration Agreement for screening by Schering.

3.   Pharmacopeia will provide the [***] Libraries listed on attached Exhibit A 
to Schering in accordance with the cost schedule therein, and at Schering's 
request, provide rearrays of such Libraries and decodes of Library Compounds on
the terms set forth on such Exhibit. Schering shall not provide any [***]
Library to any third party without the prior written consent of Pharmacopeia,
except that such consent shall not be required if the third party (i) does not
have, and will not have, any rights to any Agreement Compound, and (ii) in the
ordinary course of its business provides screening on a fee-for-service basis.

4.   Any [***] Compounds, Derivative [***] Compounds and [***] Products 
resulting from Schering's screening shall be subject to the provisions in the 
Collaboration Agreement relating thereto, including without limitation, the 
milestone and royalty obligations set forth in Sections 6.3.2 and 6.4.1(b) of 
the Collaboration Agreement.

5.   Any [***] Compounds, Derivative [***] Compounds, and [***] Products 
resulting from Schering's screening shall be subject to the provisions in the 
Collaboration Agreement relating thereto, including without limitation, the 
milestone and royalty obligations set forth in Sections 6.3.1 and 6.4.1(a) of 
the Collaboration Agreement.

6.   In the event that Schering demonstrates that any Library Compound in a
[***] Library has biological activity with respect to a particular target
outside the [***] and [***] Fields, and such Library Compound has no significant
biological activity in the [***] or [***] Fields, Schering may with notice to
Pharmacopeia designate such Library Compound as a Subject Compound (as such term
is used in the Random Library Agreement). Each Subject Compound and Derivative
Compounds thereof, and the corresponding Agreement Products, shall be treated as
Agreement Compounds and Agreement Products (as such terms are defined in the
Random Library Agreement), respectively, and shall be subject to the provisions
in the Random Library Agreement relating thereto, including without limitation,
the milestone and royalty obligations set forth in Sections 4.2.1 and 4.3.1 of
such Agreement.


* Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
7.   The remaining terms of the Agreements, except to the limited extent 
modified by the terms of this Amendment, and Amendment No. 1 to the Agreements 
effective as of August 14, 1995, shall remain in full force and effect.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly 
executed by their authorized representatives and delivered in triplicate 
originals on the Effective Date.


SCHERING CORPORATION                         PHARMACOPEIA

By: ______________________________           By: ______________________________

Name: ____________________________           Name: ____________________________

Title: ___________________________           Title: ___________________________


SCHERING-PLOUGH, LTD.

By: ______________________________

Name: ____________________________

Title: ___________________________

<PAGE>
 
                                                                EXHIBIT 10.11(C)

                  AMENDMENT NO. 3 TO COLLABORATION AGREEMENT

     This Amendment No. 3 to Collaboration Agreement (the "Amendment") 
effective as of April 21, 1997, is entered into by and between Pharmacopeia, 
Inc. ("Pharmacopeia") and Schering Corporation and Schering-Plough, Ltd. 
(collectively, "Schering"), and amends that certain Collaboration Agreement 
entered into by Pharmacopeia and Schering effective as of December 22, 1994 as 
amended (the "Agreement").

1.   All capitalized terms not defined in this Amendment shall have the meanings
     given to them in the Agreement.    

2.   Revise Section 1.2 to read in its entirety as follows:

     1.2     "Agreement Compounds" shall mean [***] Compounds, Derivative [***] 
              -------------------
Compounds, [***] Compounds, Derivative [***] Compounds, [***] Compounds and 
Derivative [***] Compounds, as well as any compositions-of-matter claimed in 
patents filed or issued under Article IX which claim [***] Compounds, Derivative
[***] Compounds, [***] Compounds, Derivative [***] Compounds, [***] Compounds, 
Derivative [***] Compounds. Agreement Compounds shall not include Excluded [***]
Products, Excluded [***] Products or Excluded [***] Products.

3.   Revise Section 1.10 by the addition of new Section 1.10.3:

     1.10.3  "Exclusively Period" with respect to any (i) [***] Library 
              ------------------
containing an [***] Compounds, or (ii) any [***] Library, shall mean for all 
compounds contained in such Library, until [***] after the end of the Research 
Program, as such period may be extended pursuant to Section 2.2, except with 
respect to [***] Compounds where the period shall be extended until [***].

4.   Revise Section 1.19 by the addition of new Section 1.19.3, 1.19.4 and 
1.19.5:

     1.19.3  "[***] Library" shall mean any library containing compounds
              -------------
developed by Pharmacopeia based on (i) proprietary Pharmacopeia information or
proprietary Schering [***], and (ii) based on and including structures which
have been shown to have activity in the [***] Field during and in the course of
the Research Program.

     1.19.4  "[***] Library" shall mean any library (excluding any [***] 
              -------------
Library) conceived after the effective date of this Amendment and prepared by 
Pharmacopeia based on proprietary Schering [***].

     1.19.5  "[***] Library" shall mean any library (excluding any [***] 
              -------------
Library, [***] Library, [***] Library or [***] Library) prepared by Pharmacopeia
for use in Pharmacopeia's internal and external programs, including the Research
Program.


*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
5.   Add the following new definitions to Article 1:

     1.34   "[***] Compound" shall mean any compound which demonstrates activity
                   --------
in the [***] Field at a concentration of [***], contained in a Library screened
by Pharmacopeia or Schering or their respective Affiliates during the term of
and in the course of performing the Research Program. It is understood that
[***] Compounds shall include compound(s) which are [***] even if they also have
biological activity via a different mechanism of action.

     1.35    "Derivative [***] Compound" shall mean any compound which
              ----------       --------
demonstrates activity in the [***] Field at a concentration of [***], which is 
derived from an [***] Compound by Pharmacopeia, Schering or their respective 
Affiliates or another third party under the authority of Schering. As used 
herein, a compound shall be deemed to have been "devired from" a [***] Compound 
(unless it is an Excluded [***] Product) if it (i) is a chemical modification 
made to an [***] Compound, (ii) is otherwise derived from a chemical synthesis 
program based on an [***] Compound, (iii) is based on structure-function data 
developed in such a program, or (iv) is developed with the use of the Licensed 
Technology. It is understood that Derivative [***] Compounds shall include 
compound(s) which are [***], even if such compounds also have another biological
activity via a different mechanism of action.

     1.36    "[***] Field" shall mean the therapeutic or prophylactic treatment 
                    -----
or prevention of diseases and conditions in humans or animals through the use of
compound(s) that are [***] alone or which, in addition, have other biological 
activity via a different mechanism of action.

     1.37    "[***] Product" shall mean any product containing a [***] Compound 
                    -------
or Derivative [***] Compound for use in the [***] Field, except Excluded [***] 
Products.

     1.38    "Excluded [***] Product" shall mean any product for use in the
              --------       -------
[***] Field which does not contain a [***] Compound or a Derivative [***]
Compound (except as set forth in subsection (i) herein), but contains (i) any
Derivative [***] Compound conceived more than [***] years after the end of the
Research Program (the "Termination Date"), except if such a conceived compound
falls within the scope of a patent granted on a Schering Invention, Joint
Invention or Pharmacopeia Invention and (1) issued as of the Termination Date or
(2) issued from a patent application pending as of the Termination Date (or a
division or continuation of such an application) and issued subsequent to the
Termination Date, (ii) a compound which is developed by Schering or its
Affiliates or by a third party under the authority of Schering during or after
the end of the Research Program, independently of the intellectual property set
forth in subsections (i)-(iv) of Section 1.35, as shown by contemporaneous
documentation, or (iii) any compound resulting from a logical series of
medicinal chemistry modifications to a compound described in subsection (ii)
above, developed by Schering independently of the intellectual property set
forth in subsections 1.35 (i)-(iv), as shown by contemporaneous documentation.


*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
6.   The Collaboration Agreement shall be revised as follows:

             (a)    In Sections 2.3.1(e) and (g), 3.4.3, 3.5, 11.4 and 13.3, all
     references to [***] Libraries shall also be deemed to refer to [***]
     Libraries. In addition, Sections 2.3.1(e) and (g), 3.5, 11.4 and 13.3 shall
     also be deemed to refer to [***] Libraries.

             (b)    In Sections 2.3.2(b), 2.7, 3.4.3 and 5.2, all references to 
     the [***] Field shall also be deemed to refer to the [***] Field.

             (c)    In Sections 1.20.2, 2.7, 5.2 and 6.3.5, all references to 
     [***] Compounds shall also be deemed to refer to [***] Compounds.

             (d)    In Sections 1.20.2 and 2.7, all references to Derivative
     [***] Compounds shall also be deemed to refer to Derivative [***]
     Compounds.

             (e)    In Sections 2.3.2(b), 2.5(a), 2.7, 2.8, 5.2, 6.3.1 (as
     amended herein), 6.4.1(a) and 9.2.6, all references to Excluded [***]
     Products shall also be deemed to refer to Excluded [***] Products.

             (f)    In Sections 2.7, 2.8, 5.2, 6.3.1 (as amended herein), 6.3.5,
     6.4.1(a), 6.4.2, 6.4.3, 6.4.4., 7.1, 8.1, 8.2, 8.3 and 8.4, all references
     to [***] Products shall also be deemed to refer to [***] Products.

7.   Section 2.3 is amended by the addition of new Section 2.3.1(i):

     2.3.1(i)During the third year of the Research Program, Pharmacopeia will
provide a minimum of [***] full-time equivalent research positions to conduct 
the Research Program.

8.   Revise Article 3 by the insertion of new Section 3.2A:

     3.2A    [***] Library Exclusivity.  Pharmacopeia and its Affiliates shall 
             -------------------------
not with respect to any of the compounds described in Section 1.10.3 during the 
applicable Exclusivity Period described in Section 1.10.3 make or use 
themselves, except with respect to the Research Program or as permitted in
Section 5.7, or knowingly provide any such compounds, for any purpose, to any
third person or entity. With respect to any [***] Library not containing an
[***] Compound, Pharmacopeia agrees not to screen such [***] Library in the
[***] Field, on its own account or on behalf of a third party until [***] years
after the end of the Research Program. This Section shall survive the
termination or expiration of this Agreement.

9.   Section 3.3 is amended to read in its entirety, as follows:

     3.3     Annual Extensions.  Schering shall have the right to extend the 
             -----------------
Exclusivity Period described in Section 1.10.2(i) or Section 1.10.3(ii) for 
successive one (1) year periods by


*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
notifying Pharmacopeia no later than sixty (60) days prior to the end of the 
Exclusivity Period, and concurrently paying to Pharmacopeia a maintenance fee 
of [***] for each year per Field, and the actual direct and indirect costs 
attributable to the preparation of any additional library plates as may be 
required for further assays, and the decoding of compounds with biological 
activity selected by Schering from such Libraries.

10.  In Section 3.4.2, line 3, change "random libraries" to [***] Libraries."

11.  Section 3.4 is amended by the addition of new Section 3.4.4:

     3.4.4   Screening for Activity in the [***] Field.  During the Research 
             -----------------------------
Program, Pharmacopeia and its Affiliates may screen any Library for activity in 
the [***] Field. All compounds identified as having activity at a concentration 
of [***] with respect to any target actually screened in the course of 
Pharmacopeia's performance of the Research Program in the [***] Field shall be 
considered [***] Compounds for all purposes of this Agreement. However, it is 
understood that no [***] Library or [***] Library shall become a [***] Library 
under any circumstance, and that there is no Exclusivity Period with respect to 
any [***] Library that does not contain an [***] Compound except as provided in 
Section 3.2A, or with respect to any [***] Library. Any milestone payments made 
pursuant to Section 6.3.1 with respect to such [***] Compounds or corresponding
[***] Products shall be in addition to any other milestone payments due pursuant
to the operation of Section 6.3.1 or 6.3.2 of the Agreement.

12.  Section 5.1 is amended to read in its entirety as follows:

     5.1     License to Schering.
             -------------------

             5.1.1  [***] Fields.  Subject to the terms and conditions of this 
                          ------
Agreement, Pharmacopeia agrees to grant, and hereby grants, (i) to Schering 
Corporation an exclusive license under the applicable Licensed Technology 
(exclusive even as to Pharmacopeia and its Affiliates) to make, have made and
use Agreement Compounds (other than [***] Compounds, Derivative [***] Compounds,
and compounds claimed in a patent or patent application filed or issued under
Article IX that also claims an [***] Compound or Derivative [***] Compound), and
to make, have made, use and sell corresponding Agreement Products (other than
[***] Products) in the United States, including its territories and possessions,
in the [***] Field and [***] Field; and (ii) to Schering-Plough, Ltd. an
exclusive license under the applicable Licensed Technology (exclusive even as to
Pharmacopeia and its Affiliates) to make, have made and use Agreement Compounds
(other than [***] Compounds, Derivative [***] Compounds, and compounds claimed
in a patent to patent application filed or issued under Article IX that also
claims an [***] Compound or Derivative [***] Compound), and to make, have made,
use and sell corresponding Agreement Products (other than [***] Products)
outside the United States and its territories and possessions, in the [***]
Field and [***] Field. It is understood that such licenses shall include


*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
the right to discover and develop Agreement Compounds and Agreement Products and
to conduct drug research in the [***] Field and [***] Field after the term of
the Research Program during the term of this Agreement.

             5.1.2  [***] Field.
                          -----

                    (a)  Subject to the terms and conditions of this Agreement, 
Pharmacopeia agrees to grant, and hereby grants, (i) to Schering Corporation an 
exclusive license under the applicable Licensed Technology (exclusive even as to
Pharmacopeia and its Affiliates) to make, have made and use [***] Compounds and 
Derivative [***] Compounds, and make, have made, use and sell [***] Products in 
the United States, including its territories and possessions, in the [***] 
Field; and (ii) to Schering-Plough, Ltd. an exclusive license under the 
applicable Licensed Technology (exclusive even as to Pharmacopeia and its 
Affiliates) to make, have made and use [***] Compounds and Derivative [***] 
Compounds, and make, have made, use and sell [***] Products, outside the United 
States and its territories and possessions, in the [***] Field.  It is 
understood that such licenses shall include the right to discover and develop 
Agreement Compounds and Agreement Products and to conduct drug research after 
the term of the Research Program during the term of this Agreement.

                    (b)  Subject to the terms and conditions of this Agreement, 
Pharmacopeia agrees to grant, and hereby grants:

                         (i)  to Schering Corporation an exclusive license under
the applicable Licensed Technology (exclusive even as to Pharmacopeia and its 
Affiliates) to make, have made and use any Agreement Compound (other than an
[***] Compound or Derivative [***] Compound) which is claimed in a patent or 
patent application filed or issued under Article IX that also claims an [***]
Compound or Derivative [***] Compound, and to make, have made, use and sell
corresponding Agreement Products in the [***] Field in the United States,
including its territories and possessions; and

                         (ii) to Schering-Plough, Ltd. an exclusive license
under the applicable Licensed Technology (exclusive even as to Pharmacopeia and
its Affiliates) to make, have made and use any Agreement Compound (other than an
[***] Compound or Derivative [***] Compound) which is claimed in a patent or 
patent application filed or issued under Article IX that also claims an [***]
Compound or Derivative [***] Compound, and to make, have made, use and sell
corresponding Agreement Products in the [***] Field outside the United States
and its territories and possessions.


*Information omitted and filed separately with the Commission under Rule 24b-2.
<PAGE>
 
                    (iii)     It is understood that the foregoing licenses 
shall include the right to discover and develop Agreement Compounds and 
Agreement Products and to conduct drug research in the [***] Field after the 
term of the Research Program during the term of this Agreement.

13.  Amend Section 5.5 by the addition of new Section 5.5.3:

     5.5.3  With Respect to the [***] Field.  During and until the earlier of 
            -------------------       -----
(a) [***] after the termination of the Research Program, if the Research Program
in the [***] Field does not proceed with full staffing until [***], or (b) [***]
after the end of the Research Program, Pharmacopeia and its Affiliates will not 
knowingly (i) make compounds or combinatorial libraries for or with any third
person or entity specifically for screening in the [***] Field alone or for 
screening in the [***] Field in conjunction with screening other fields, (ii) 
perform contract screening for or with any third person or entity with respect 
to the [***] Field, (iii) perform for its own account any screening of compound 
in the [***] Field, or (iv) provide materials or reagents to any third person 
for screening for activity in the [***] Field.

14.  Amend Section 5.8 to read in its entirety as follows:

     5.8    Pharmacopeia Assay License.  Pharmacopeia and its Affiliates shall 
            --------------------------
have the nonexclusive right to use during the Research Program intellectual
property of Schering, such as reagents, as reasonably necessary to assay
compounds in [***], [***], [***] and [***] Libraries for activity in the [***]
Fields, as appropriate, and as permitted pursuant to Section 3.4.2 or for
purposes of the demonstration required under Section 5.11(b). Pharmacopeia and
its Affiliates shall also have the nonexclusive right to use during the Research
Program intellectual property of Schering relating to [***] for the design and
synthesis of [***] Libraries and [***] Libraries. Except as provided herein with
respect to Section 5.11(b), the licenses granted under this Section 5.8 shall
expire upon the expiration or termination of the Research Program and
Pharmacopeia shall thereafter have no further right or license to use any
intellectual property of Schering which is subject to this Section 5.8.
Pharmacopeia will not be required to pay any fees to use such intellectual
property, but will as a condition precedent to such use execute any consents or
sublicenses required by any Schering licensor. Pharmacopeia shall not be
required to execute any unreasonable consents or licenses and will not be in
breach of this Agreement for failure to do so.

15.  Revise Article 5 by the insertion of new Section 5.11:

     5.11   License to Pharmacopeia Outside [***] Field
            -------------------------------       -----
     
            (a)    Subject to the terms and condition of this Agreement, 
Schering Corporation and Schering-Plough, Ltd. agree to grant, and hereby grant
to Pharmacopeia an exclusive, worldwide license under the interest of Schering 
Corporation and Schering-Plough,

*Information omitted and filed separately with the Commission under Rule 24b-2
<PAGE>
 
Ltd. (exclusive in each case even as to Schering Corporation, Schering-Plough, 
Ltd. and their Affiliates) in the applicable Licensed Technology to make, have 
made and use any compound in an [***] Library (other than an [***] Compound or 
Derivative [***] Compound) which is claimed in a patent or patent application 
filed or issued under Article IX that also claims an [***] Compound or 
Derivative [***] Compound, and to make, have made, use and sell corresponding 
Agreement Products outside the [***] Field.

          (b)  If Pharmacopeia demonstrates to Schering that any Agreement 
Compound (other than an [***] Compound, Derivative [***] Compound, or compound 
in an [***] Library), which is claimed in a patent or patent application filed 
or issued under Article IX that also claims an [***] Compound or Derivative 
[***] Compound, does not have activity against the [***] at a concentration 
[***], then Schering Corporation and Schering-Plough, Ltd. agree to grant, and 
hereby grant to Pharmacopeia an exclusive, worldwide license under the interest 
of Schering Corporation and Schering-Plough, Ltd. (exclusive in each case even 
as to Schering Corporation, Schering-Plough, Ltd. and their Affiliates) in the 
applicable Licensed Technology to make, have made and use such Agreement 
Compound, and to make, have made, use and sell corresponding Agreement Products
outside the [***] Field.

16.  Section 6.1.1 is amended to read in its entirety as follows:

     6.1.1 Research Program Funding. Schering agrees to pay to Pharmacopeia 
           ------------------------
research funding with respect to the Research Program, in the following amounts:

                    Period              Amount
                    ------              ------

                    Year 1              [***]
                    Year 2              [***] 

During the third year of the Research Program, Schering shall pay [***] in
research funding for such period. Any payments for full-time equivalent research
positions payable by operation of this or the other sections of this Agreement
shall be deemed offset against the aforementioned payments in this Section
6.1.1, provided it is understood that Schering's total obligations may not
exceed [***] in such third year. However, if the Research Program is expanded
pursuant to Section 2.4, or if substitute or additional targets have been added
to the Research Program pursuant to Section 2.4, Schering shall pay to
Pharmacopeia the additional amounts specified in such Sections which are be due.
If the Research Program is extended pursuant to Section 2.2.2, Schering shall
pay to Pharmacopeia the additional amounts specified in such Section which are
due.

*Information omitted and filed separately with the Commission under Rule 24b-2.



<PAGE>
 
17.  The second sentence of Section 6.3.1 is amended by inserting after "one (1)
time", the phrase "in the [***] Field and one (1) time in the [***] Field".

18.  After Pharmacopeia has notified Schering that it has completed screening a 
[***] Library or [***] Library in the Research Program in the [***] Field, 
Schering may upon written notice request that Pharmacopeia provide to Schering 
copies of such [***] Library or [***] Library for screening by Schering against 
any target, on the following terms and conditions:

          (a)  Pharmacopeia will provide such Library to Schering within six (6)
months of such written request. Schering shall pay to Pharmacopeia the direct
and indirect costs associated with preparing such Library. At Schering's
request, Pharmacopeia shall provide rearrays of such Libraries and decodes of
Library compounds on the terms set forth on Exhibit A hereto. Schering shall not
provide any [***] Library or [***] Library to any third party without the prior
written consent of Pharmacopeia, except that such consent shall not be required
if the third party (i) does not have, and will not have, any rights to any
Agreement Compound, and (ii) in the ordinary course of its business provides
screening on a fee-for-services basis.

          (b)  Any [***] Compounds, Derivative [***] Compounds and [***] 
Products, and any other product based on inhibitory activity against a [***] 
resulting from Schering's screening of the [***] or [***] Libraries, shall be 
subject to the provisions in the Collaboration Agreement relating to [***] 
Compounds and [***] Products, including without limitation, the milestone and 
royalty obligations set forth in Section 6.3.1 and 6.4.1(a) of the 
Collaboration Agreement.

          (c)  In the event that Schering demonstrates that any Library compound
in a [***] Library or a [***] Library has biological activity with respect to a
particular target which is not a [***], and such Library compound has no
significant biological activity in the [***] Fields, Schering may with notice to
Pharmacopeia designate such Library compound as a Subject Compound (as such term
is used in the Random Library Agreement entered by the parties effective
December 22, 1994). Each Subject Compound and Derivative Compounds thereof, and
the corresponding Agreement Products, shall be treated as Agreement Compounds
and Agreement Products (as such terms are defined in the Random Library
Agreement), respectively, and shall be subject to the provisions in the Random
Library Agreement relating thereto, including without limitation, the milestone
and royalty obligations set forth in Sections 4.2.1 and 4.3.1 of such Agreement.

19.  Pharmacopeia will provide to Schering the [***] Libraries prepared by
Pharmacopeia pursuant to the Agreement for screening by Schering on the
following terms and conditions:


*Information omitted and filed separately with the Commission under Rule 24b-2. 
<PAGE>
 
          (a)  Pharmacopeia will provide the [***] Libraries to Schering in 
accordance with the cost schedule on attached Exhibit A, and at Schering's 
request, provide rearrays of such Libraries and decodes of Library compounds on 
the terms set forth on such Exhibit. Schering shall not screen any [***] Library
in the [***] Field or [***] Field; nor shall Schering provide any [***] Library 
to any third party without the prior written consent of Pharmacopeia, except 
that such consent shall not be required if the third party (i) does not have, 
and will not have, any rights to any Agreement Compound, and (ii) in the 
ordinary course of its business provides screening on a fee-for-services basis.

          (b)  Any [***] Compounds, Derivative [***] Compounds and [***] 
Products resulting from Schering's screening shall be subject to the milestone 
and royalty provisions set forth in Sections 6.3.1 and 6.4.1(a) of the 
Collaboration Agreement.

          (c)  In the event that Schering demonstrates that any Library compound
in a [***] Library has biological activity with respect to a particular target 
outside the [***] Fields, and such Library compound has no significant 
biological activity in the [***] Fields, Schering may with notice to 
Pharmacopeia designate such Library compound as a Subject Compound (as such term
is used in the Random Library Agreement entered by the parties effective 
December 22, 1994). Each Subject Compound and Derivative Compounds thereof, and 
the corresponding Agreement Products, shall be treated as Agreement Compounds 
and Agreement Products (as such terms are defined in the Random Library 
Agreement), respectively, and shall be subject to the provisions in the Random 
Library Agreement relating thereto, including without limitation, the milestone 
and royalty obligations set forth in Sections 4.2.1 and 4.3.1 of such Agreement.

20.  Except as specifically modified or amended hereby or by the Amendment to 
the Collaboration Agreement dated December 18, 1996, and Amendments No.1 and 2 
to the Collaboration Agreement and Random Library Agreement, the Agreement shall
remain in full force and effect and, as modified or amended, is hereby ratified,
confirmed and approved. No provision of this Amendment may be modified or 
amended except expressly in a writing signed by both parties nor shall any terms
be waived except expressly in a writing signed by the party charged therewith. 
This Amendment shall be governed in accordance with the laws of the State of New
Jersey, without regard to principles of conflicts of laws.

* Information omitted and filed separately with the Commission under Rule 24b-2.
 


<PAGE>
 
     IN WITNESS WHEREOF, each of the parties has executed this Amendment as of 
the date indicated on this Amendment.


SCHERING CORPORATION                         PHARMACOPEIA, INC.



By: ______________________________           By: ______________________________ 

Name: ____________________________           Name: ____________________________

Title: ___________________________           Title: ___________________________

Date: ____________________________           Date: ____________________________ 


SCHERING-PLOUGH, LTD.


By: ______________________________ 

Name: ____________________________

Title: ___________________________

Date: ____________________________ 

<PAGE>
 
                   AMENDMENT NO. 1 TO COLLABORATION AGREEMENT


     This Amendment No. 1 to Collaboration Agreement (the "Amendment") effective
as of April 14, 1997, is entered into by and between Pharmacopeia, Inc.
("Pharmacopeia") and Daiichi Pharmaceutical Co., Ltd ("Daiichi"), and amends
that certain Collaboration Agreement entered into by Pharmacopeia and Daiichi
effective as of March 29, 1996 (the "Agreement").

1.   All capitalized terms not defined in this Amendment shall have the meaning 
     given to them in the Agreement.

2.   Section 7.6 is amended to read in its entirety as follows:

     7.6  Equity Investment. Subject to the terms and conditions of the Common
          -----------------
     Stock Purchase Agreement, Daiichi shall purchase from Pharmacopeia on the
     Effective Date $5,000,000 of Pharmacopeia Common Stock [***]. In addition,
     Daiichi shall purchase from Pharmacopeia $3,000,000 of Pharmacopeia Common
     Stock [***] the date of (i), (ii), (iii) mentioned below, which purchase of
     Pharmacopeia Common Stock shall occur on the tenth (10th) business day
     following [***].

3.   Article 7 is amended by the addition of the following new Section 7.9:

     7.9 Confirmation of [***]. Promptly following Pharmacopeia's
         ---------------------     
     indentification of a Collaboration Compound as [***], Pharmacopeia shall
     notify Daiichi thereof and shall provide to Daiichi a [***] sample of such
     Collaboration Compound. Daiichi shall have [***] from the date it receives
     such sample (the "Confirmation Period") to notify Pharmacopeia whether
     Daiichi has confirmed that such Collaboration Compound satisfies the
     Criteria for [***]. In the event that Daiichi's analysis does not confirm
     that a particular Collaboration Compound indentified by Pharmacopeia as
     [***] meets the Criteria for [***], Daiichi shall promptly notify
     Pharmacopeia during the Confirmation Period, and Daiichi and Pharmacopeia
     personnel will work together, at Pharmacopeia's laboratories, for a period
     not to exceed [***] from the date Daiici initially received the sample, to
     make a final agreed determination whether or not such Collaboration
     Compound satisfies the Criteria for [***].
 
4.   Except as specifically modified or amended hereby, the Agreement shall
     remain in full force and effect and, as modified or amended, hereby
     ratified, confirmed and approved. No provision of this Amendment may be
     modified or amended except expressly in a writing signed by both parties
     nor shall any terms be waived except expressly in a writing signed by the
     party charged therewith. This Amendment shall be governed in accordance
     with the laws of the State of New Jersey, without regard to principles of
     conflicts of laws.

*Information omitted and filed separately with the Commission under Rule 24b-2.




    
<PAGE>
 

     In WITNESS WHEREOF, each of the parties has executed this Amendment as of 
the date indicated on this Amendment.

DAIICHI PHARMACEUTICAL CO., LTD.          PHARMACOPEIA, INC.

By:_____________________________              By:_____________________________

Name:___________________________              Name:___________________________ 

Title:__________________________              Title:__________________________

Date:___________________________              Date:___________________________

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS FOR THE SIX MONTHS ENDED JUNE 30, 1997 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE IN SUCH STATEMENTS.
</LEGEND>
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<PERIOD-TYPE>                   6-MOS
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